Thanks for the swift respons!
Goodness, I really thought after so many years one has to demag the deck/head sooner or later.
Unfortunately I do not have the original set kit and tapes. I do have the factory issued red booklet with all the machines' testschematics. Is this helpfull for my quest for optimal use? The motor oparates within reasonable satisfaction in play, although forward and rewind is sometimes a bit slow... Does that have something to do with the belts or drive, or is this just the tapes being 90 minutes?
Can I stil do something (if needed, is it?) on azimuth control?
Tomaso